//: concurrency/FixedDiningPhilosophers.java
// Dining philosophers without deadlock.
// {Args: 5 5 timeout}

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class FixedDiningPhilosophers {
    public static void main(String[] args) throws Exception {
        int ponder = 5;
        if (args.length > 0)
            ponder = Integer.parseInt(args[0]);
        int size = 5;
        if (args.length > 1)
            size = Integer.parseInt(args[1]);
        ExecutorService exec = Executors.newCachedThreadPool();
        Chopstick[] sticks = new Chopstick[size];
        for (int i = 0; i < size; i++)
            sticks[i] = new Chopstick();
        for (int i = 0; i < size; i++)
            if (i < (size - 1))
                exec.execute(new Philosopher(
                        sticks[i], sticks[i + 1], i, ponder));
            else
                exec.execute(new Philosopher(
                        sticks[0], sticks[i], i, ponder));
        if (args.length == 3 && args[2].equals("timeout"))
            TimeUnit.SECONDS.sleep(5);
        else {
            System.out.println("Press 'Enter' to quit");
            System.in.read();
        }
        exec.shutdownNow();
    }
} /* (Execute to see output) *///:~
